OH-88 Hydroxy-terminated polymethylamino siloxane
OH-88 Hydroxy-Terminated Polymethylamino Siloxane (CAS 63148-58-3) is an amino-functional silicone fluid with hydroxyl end groups. It offers strong reactivity, good adhesion, and thermal stability. Commonly used in coatings, adhesives, textiles, and personal care for softness, flexibility, and water repellency.
Product Introduction:
OH-88 Hydroxy-Terminated Polymethylamino Siloxane, CAS No. 63148-58-3, is an amino-functional silicone fluid with hydroxyl end groups. This high-performance reactive silicone polymer is designed for use in systems requiring chemical reactivity, substrate adhesion, and thermal stability. The amino side groups and hydroxy terminations provide enhanced compatibility with organic resins, improve crosslinking efficiency, and promote surface wetting.
This specialty silicone material is widely applied in high-performance coatings, adhesives, textile finishes, and personal care formulations, where flexibility, water repellency, and surface softness are essential.
Technical Specifications
| Property | Typical Value |
|---|---|
| Chemical Name | Hydroxy-Terminated Polymethylamino Siloxane |
| CAS Number | 63148-58-3 |
| Molecular Structure | Linear polysiloxane with amino side groups |
| Appearance | Clear to light-yellow transparent liquid |
| Viscosity (@25 °C) | 20 – 1000 mPa·s (adjustable on request) |
| Density (@25 °C) | ~1.00 – 1.10 g/cm³ |
| Refractive Index (nD @20 °C) | ~1.4700 |
| Flash Point | > 240 °C |
| Solubility | Soluble in alcohols, ketones, aromatics; insoluble in water |
| Storage Conditions | Store in sealed containers below 30 °C; protect from moisture |
Key Features & Benefits
Amino-functional silicone polymer for enhanced chemical bonding
 Terminal hydroxyl groups allow easy crosslinking with silanes, isocyanates, and epoxies
 Provides excellent surface adhesion on glass, metals, and plastics
 Low surface energy ensures superior wetting and anti-static performance
 Thermal stability and oxidation resistance ideal for heat-curable systems
 Non-volatile, low-VOC silicone additive for sustainable formulations
Typical Applications
This hydroxy-terminated polymethylamino siloxane is used in a wide range of technical and industrial formulations:
Silicone-modified coatings for improved substrate adhesion and surface flexibility
Reactive silicone sealants and adhesives requiring chemical resistance
Textile softeners with durable hydrophobic and antistatic properties
Hair care and skin formulations for conditioning and film formation
Release agents and surface modifiers in plastics and elastomers
Packaging Options:
We offer flexible packaging for both R&D and bulk industrial use:
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1 kg & 5 kg HDPE bottles (sample/lab-scale)
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25 kg pails & 200 kg drums (industrial production)
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1000 kg IBC totes available on request
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Custom viscosity grades and formulations available under Silico® brand lines
All technical data provided is based on current knowledge and experience. Users must test product suitability for intended applications.
No warranties are expressed or implied. Silico® assumes no liability for incidental or consequential damages.
Jessica G.
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